{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:7NPVTGVEUUTP6LCZDWJIT7UB5U","short_pith_number":"pith:7NPVTGVE","canonical_record":{"source":{"id":"1311.4050","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-11-16T12:27:49Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"5364f0e12c85076af99b53b379d3cdc412bea3af06eb0b95a99bbfdbb0280e6d","abstract_canon_sha256":"c221b6470f4d637240bb0b235b4701d3ae3d4c01d604a7a03653dc8df4e4534e"},"schema_version":"1.0"},"canonical_sha256":"fb5f599aa4a526ff2c591d9289fe81ed1e153379f373f56114cf7197a0a7aa00","source":{"kind":"arxiv","id":"1311.4050","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.4050","created_at":"2026-05-18T03:06:53Z"},{"alias_kind":"arxiv_version","alias_value":"1311.4050v1","created_at":"2026-05-18T03:06:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.4050","created_at":"2026-05-18T03:06:53Z"},{"alias_kind":"pith_short_12","alias_value":"7NPVTGVEUUTP","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"7NPVTGVEUUTP6LCZ","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"7NPVTGVE","created_at":"2026-05-18T12:27:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:7NPVTGVEUUTP6LCZDWJIT7UB5U","target":"record","payload":{"canonical_record":{"source":{"id":"1311.4050","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-11-16T12:27:49Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"5364f0e12c85076af99b53b379d3cdc412bea3af06eb0b95a99bbfdbb0280e6d","abstract_canon_sha256":"c221b6470f4d637240bb0b235b4701d3ae3d4c01d604a7a03653dc8df4e4534e"},"schema_version":"1.0"},"canonical_sha256":"fb5f599aa4a526ff2c591d9289fe81ed1e153379f373f56114cf7197a0a7aa00","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:06:53.827589Z","signature_b64":"SDlVui4TOQIVitXqM2wWaO1moXomUxBjp7fMrP8rwmNgPMkbJiafsfpopI26StGTzpKMN6lgnmfeU3sbXTI0Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fb5f599aa4a526ff2c591d9289fe81ed1e153379f373f56114cf7197a0a7aa00","last_reissued_at":"2026-05-18T03:06:53.826830Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:06:53.826830Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1311.4050","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:06:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jZyy3Bl0TCah/zLniykPsMRF041tQiSM919MGksvk+G+8BBxI4qSG3hYulsWU2wOf3CCeo7M8jsgdUvR8ERtCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:37:02.888200Z"},"content_sha256":"b7d2c3a40229159e3396f170f9ebdc338807d93fc9a26c278310a5bf0a8f59e8","schema_version":"1.0","event_id":"sha256:b7d2c3a40229159e3396f170f9ebdc338807d93fc9a26c278310a5bf0a8f59e8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:7NPVTGVEUUTP6LCZDWJIT7UB5U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Verification of Anisotropic s-Wave Superconducting Gap Structure in CeRu2 from Low-Temperature Field-Angle-Resolved Specific Heat Measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"Kazushige Machida, Masato Hedo, Shunichiro Kittaka, Toshiro Sakakibara, Yoshichika Onuki","submitted_at":"2013-11-16T12:27:49Z","abstract_excerpt":"The field-angle-resolved specific heat C(T,H,phi) of the f-electron superconductor CeRu2 (Tc=6.3 K) has been measured at low temperatures down to 90 mK on two single crystals of slightly different qualities. We reveal that the C(phi) oscillation in a rotating magnetic field, originating from the gap anisotropy, diminishes at low temperatures below the characteristic field H*, as expected for an anisotropic gap without nodes. We also observe the suppression of H* by decreasing the gap anisotropy ratio $\\Delta_{\\rm min}/\\Delta_{\\rm max}$, a behavior that has been predicted from a microscopic the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.4050","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:06:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r1Vz+UyG4BN7LNCUKWbOe3OeQzARKlNNNCjXnYK7faQgiWYe7pjEQlvDqCW+8L0C7J9sUdxOaW9OaCmaY/D3Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:37:02.888776Z"},"content_sha256":"fbceb83339278e2e63bb4517fe82bb035f60c816bee61253fb6220d26e8be8f1","schema_version":"1.0","event_id":"sha256:fbceb83339278e2e63bb4517fe82bb035f60c816bee61253fb6220d26e8be8f1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7NPVTGVEUUTP6LCZDWJIT7UB5U/bundle.json","state_url":"https://pith.science/pith/7NPVTGVEUUTP6LCZDWJIT7UB5U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7NPVTGVEUUTP6LCZDWJIT7UB5U/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-26T12:37:02Z","links":{"resolver":"https://pith.science/pith/7NPVTGVEUUTP6LCZDWJIT7UB5U","bundle":"https://pith.science/pith/7NPVTGVEUUTP6LCZDWJIT7UB5U/bundle.json","state":"https://pith.science/pith/7NPVTGVEUUTP6LCZDWJIT7UB5U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7NPVTGVEUUTP6LCZDWJIT7UB5U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:7NPVTGVEUUTP6LCZDWJIT7UB5U","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"c221b6470f4d637240bb0b235b4701d3ae3d4c01d604a7a03653dc8df4e4534e","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-11-16T12:27:49Z","title_canon_sha256":"5364f0e12c85076af99b53b379d3cdc412bea3af06eb0b95a99bbfdbb0280e6d"},"schema_version":"1.0","source":{"id":"1311.4050","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.4050","created_at":"2026-05-18T03:06:53Z"},{"alias_kind":"arxiv_version","alias_value":"1311.4050v1","created_at":"2026-05-18T03:06:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.4050","created_at":"2026-05-18T03:06:53Z"},{"alias_kind":"pith_short_12","alias_value":"7NPVTGVEUUTP","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"7NPVTGVEUUTP6LCZ","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"7NPVTGVE","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:fbceb83339278e2e63bb4517fe82bb035f60c816bee61253fb6220d26e8be8f1","target":"graph","created_at":"2026-05-18T03:06:53Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The field-angle-resolved specific heat C(T,H,phi) of the f-electron superconductor CeRu2 (Tc=6.3 K) has been measured at low temperatures down to 90 mK on two single crystals of slightly different qualities. We reveal that the C(phi) oscillation in a rotating magnetic field, originating from the gap anisotropy, diminishes at low temperatures below the characteristic field H*, as expected for an anisotropic gap without nodes. We also observe the suppression of H* by decreasing the gap anisotropy ratio $\\Delta_{\\rm min}/\\Delta_{\\rm max}$, a behavior that has been predicted from a microscopic the","authors_text":"Kazushige Machida, Masato Hedo, Shunichiro Kittaka, Toshiro Sakakibara, Yoshichika Onuki","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-11-16T12:27:49Z","title":"Verification of Anisotropic s-Wave Superconducting Gap Structure in CeRu2 from Low-Temperature Field-Angle-Resolved Specific Heat Measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.4050","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:b7d2c3a40229159e3396f170f9ebdc338807d93fc9a26c278310a5bf0a8f59e8","target":"record","created_at":"2026-05-18T03:06:53Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"c221b6470f4d637240bb0b235b4701d3ae3d4c01d604a7a03653dc8df4e4534e","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-11-16T12:27:49Z","title_canon_sha256":"5364f0e12c85076af99b53b379d3cdc412bea3af06eb0b95a99bbfdbb0280e6d"},"schema_version":"1.0","source":{"id":"1311.4050","kind":"arxiv","version":1}},"canonical_sha256":"fb5f599aa4a526ff2c591d9289fe81ed1e153379f373f56114cf7197a0a7aa00","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fb5f599aa4a526ff2c591d9289fe81ed1e153379f373f56114cf7197a0a7aa00","first_computed_at":"2026-05-18T03:06:53.826830Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:06:53.826830Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SDlVui4TOQIVitXqM2wWaO1moXomUxBjp7fMrP8rwmNgPMkbJiafsfpopI26StGTzpKMN6lgnmfeU3sbXTI0Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:06:53.827589Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.4050","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b7d2c3a40229159e3396f170f9ebdc338807d93fc9a26c278310a5bf0a8f59e8","sha256:fbceb83339278e2e63bb4517fe82bb035f60c816bee61253fb6220d26e8be8f1"],"state_sha256":"d4fda3f5731ebe93e295be0a8c69f699d48ad792e5ae300a5874469593e1c64d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"375e2Y9xtjFpSPa/4mH0x9mji02kBXUdrI0orP7ou/jcSI+yBsQv9yvvyErH1VooN1C5xQcbyx//Mg7UWr1sDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T12:37:02.892608Z","bundle_sha256":"042e4e89ed89283c0e824514b6be9ff47c90ccea16eeedc01077a676861648f1"}}